/srv/irclogs.ubuntu.com/2018/01/08/#ubuntu-kernel.txt

f_gbjf: thanks. like I said, we've already completed our in-house testing based on those and have begun rollout to users yesterday - no negative feedback so far, let's see what today brings ;)07:05
=== lan3y is now known as Laney
alkisgIf I want to buy a new intel cpu, can I buy something that won't have the meltdown/spectre performance impact?09:09
apwnot that i know of09:12
alkisgThank you apw09:15
f_gI think one of the backports for 4.4 left an erroenous kfree in arch/x86/events/intel/ds.c09:32
f_gf8365429a3dc1377e99d821be17cdeb76dd4b81509:32
f_gvs 20cbe9a3aa2e341824da57ce0ac6d52cbffaa57009:33
f_gthe latter removes kfree(ds); from release_ds_buffer09:34
f_gthe commits are otherwise identical (modulo location of modified file and commit message/hashes)09:35
f_gapw, bjf: ^^09:36
apwf_g, odd11:17
f_gprobably just an oversight since the diff was manually applied / fixed up? not sure..11:17
apwf_g, most likely, but still an odd differnce11:19
f_gapw: users reported the following on some HP DL G7 boxes: https://imgur.com/a/vVbR0 , I'll see whether the kernel without the kfree gets rid of that11:21
apwf_g, which tree is 20cbe9a3aa2e341824da57ce0ac6d52cbffaa570 in ?11:25
f_gv4.4.11011:26
f_g(~33 to be exact)11:29
apwahh ok11:33
tseliotapw: hey, any reason why the updates seem to require libelf-dev to be installed? bbswitch said that when DKMS failed. Nvidia didn't build either, but I missed the log11:46
apwtseliot, i do not, sounds odd anything would be different11:46
tseliotapw: let me try removing that package, to see if I can reproduce the problem with nvidia11:47
=== mwsb is now known as chu
tseliotapw: yes, I can reproduce it: Makefile:969: *** "Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel". Stop.11:49
apwis that for out of tree bits using the kernel ?11:49
tseliotapw: nvidia and bbswitch11:51
f_gZFS as well11:51
f_g(when building out-of-tree)11:51
tseliotapw: that's with 4.13.0-24.2811:52
f_g(we reverted to FRAME_POINTER downstream)11:52
apwtseliot, sounds like we should add that as a dependency of the headers11:52
tseliotapw: I think so. I've tested this in artful11:53
tseliotlet me send an email, I'm not sure you are subscribed. Leann is11:54
ernstpI noticed that the cves fixed in 4.13.0-22.25 are not fixed in 4.13.0-24.28 right now15:30
bjfernstp, that is correct. the meltdown patches have been applied to the code that was in the previous -update15:39
bjfernstp, the CVEs that were sitting in -proposed will be reapplied and released at a future date15:40
dsdapw: hi again, anything i can help with to help the KPTI work move forward?15:54
dsd(artful)15:54
leitaowhen I try to build trusty kernel on ppc64el I got /home/ubuntu/kernel/linux-private/arch/powerpc/kernel/exceptions-64s.S:721: Error: unrecognized opcode: `hwsync'16:40
leitaoshould I upgrade gcc in order to build the kernel?16:40
leitaoI am using standard gcc-4.816:41
cjwatsonthis isn't my field but wouldn't that be binutils rather than gcc?16:43
cjwatsonadded in 2.25.1 I *think(*16:44
leitaocjwatson, was binutils 2.25 made available on trusty?16:47
cjwatsonI don't know if the relevant feature was backported16:47
cjwatsonnot my field, like I say16:47
leitaocjwatson, no worries. I am wondering how it is being compiled.16:49
leitaoklebers, do you know?16:49

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